Improvement in oxidation resistance of TiB2 by formation of protective SiO2 layer on surface

Young Hag Koh; Hae Won Kim; Hyoun Ee Kim

doi:10.1557/JMR.2001.0023

Improvement in oxidation resistance of TiB₂ by formation of protective SiO₂ layer on surface

Young Hag Koh, Hae Won Kim, Hyoun Ee Kim

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

To improve the oxidation resistance of TiB₂ material, dense silica (SiO₂) layer was caused to form on the surface. The coating layer was formed on the surface by exposing the specimens next to a bed of SiC powder in a flowing H₂ containing 0.1% H₂O at 1450°C. Part of SiO₂ "smoke", generated by a reaction between the SiC powder and H₂O in the He gas stream, was deposited on the sample surface to form a dense and uniform SiO₂ layer. Beneath the SiO₂ layer, an interracial layer composed of Ti₂O₃ and B₂O₃ was formed. Oxidation resistance of the specimen was improved markedly by the coating layers. The coating layers enhanced the oxidation resistance through the retardation of oxygen transport and also through the consumption of oxygen by a reaction with Ti₂O₃ to form TiO₂.

Original language	English
Pages (from-to)	132-137
Number of pages	6
Journal	Journal of Materials Research
Volume	16
Issue number	1
DOIs	https://doi.org/10.1557/JMR.2001.0023
Publication status	Published - 2001 Jan
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/JMR.2001.0023

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abstract = "To improve the oxidation resistance of TiB2 material, dense silica (SiO2) layer was caused to form on the surface. The coating layer was formed on the surface by exposing the specimens next to a bed of SiC powder in a flowing H2 containing 0.1% H2O at 1450°C. Part of SiO2 {"}smoke{"}, generated by a reaction between the SiC powder and H2O in the He gas stream, was deposited on the sample surface to form a dense and uniform SiO2 layer. Beneath the SiO2 layer, an interracial layer composed of Ti2O3 and B2O3 was formed. Oxidation resistance of the specimen was improved markedly by the coating layers. The coating layers enhanced the oxidation resistance through the retardation of oxygen transport and also through the consumption of oxygen by a reaction with Ti2O3 to form TiO2.",

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AU - Kim, Hae Won

AU - Kim, Hyoun Ee

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AB - To improve the oxidation resistance of TiB2 material, dense silica (SiO2) layer was caused to form on the surface. The coating layer was formed on the surface by exposing the specimens next to a bed of SiC powder in a flowing H2 containing 0.1% H2O at 1450°C. Part of SiO2 "smoke", generated by a reaction between the SiC powder and H2O in the He gas stream, was deposited on the sample surface to form a dense and uniform SiO2 layer. Beneath the SiO2 layer, an interracial layer composed of Ti2O3 and B2O3 was formed. Oxidation resistance of the specimen was improved markedly by the coating layers. The coating layers enhanced the oxidation resistance through the retardation of oxygen transport and also through the consumption of oxygen by a reaction with Ti2O3 to form TiO2.

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Improvement in oxidation resistance of TiB₂ by formation of protective SiO₂ layer on surface

Abstract

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